vii, 165 [14] leaves : ill. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physical and Inorganic Chemistry, 1973

Title page, abstract and table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / With the increasing use of lasers it is necessary to develop materials that can provide protection to eyes and other sensitive devices. This thesis reports on an investigation into optical limiting of Transition Metal Acetylides (TMAs) that transmit ambient light levels of light but block high energy (laser) light across the visible part of the spectrum. A standard optical limiting testbed is used to measure opt~callimiting at 470, 532 and 630 om for a wide range of Pt:ethynyl related TMAs. I report the effect on optical limiting of altering the central bridge, heavy metal, terminal group, solubilising group and oligomerisation. Most of these materials showed poor optical limiting, especially in the red. Two dimers of Pt:ethynyl, however, have clamping levels at 532 om better than that for Pt:ethynyl. I therefore describe a detailed spectroscopic investigation of two series of oligomers and discuss their structure/property relationships. This investigation also includes a precursor ofPtethynyl, PEPE, which shows remarkable limiting. I also report modelling of optical limiting using a 5-level model constructed using the spectroscopic data. I show that the 5-level model can be validated and accurately predicts the limiting for PEPE against both ps and ns pulses. It can also be used to predict ps limiting for Pt:ethynyl and its oligomers. For ns pulses, however, it predicts much less limiting than that observed. I therefore propose a new mechanism that is important for ns limiting by TMAs. Finally I discuss the broadband limiting of these materials and from analysis of the measurements· I describe structures of materials that may show promising broadband optical limiting. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1320307 / Thesis (Ph.D.) -- University of Adelaide, School of Chemistry and Physics, 2008

Title page, abstract and table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / With the increasing use of lasers it is necessary to develop materials that can provide protection to eyes and other sensitive devices. This thesis reports on an investigation into optical limiting of Transition Metal Acetylides (TMAs) that transmit ambient light levels of light but block high energy (laser) light across the visible part of the spectrum. A standard optical limiting testbed is used to measure opt~callimiting at 470, 532 and 630 om for a wide range of Pt:ethynyl related TMAs. I report the effect on optical limiting of altering the central bridge, heavy metal, terminal group, solubilising group and oligomerisation. Most of these materials showed poor optical limiting, especially in the red. Two dimers of Pt:ethynyl, however, have clamping levels at 532 om better than that for Pt:ethynyl. I therefore describe a detailed spectroscopic investigation of two series of oligomers and discuss their structure/property relationships. This investigation also includes a precursor ofPtethynyl, PEPE, which shows remarkable limiting. I also report modelling of optical limiting using a 5-level model constructed using the spectroscopic data. I show that the 5-level model can be validated and accurately predicts the limiting for PEPE against both ps and ns pulses. It can also be used to predict ps limiting for Pt:ethynyl and its oligomers. For ns pulses, however, it predicts much less limiting than that observed. I therefore propose a new mechanism that is important for ns limiting by TMAs. Finally I discuss the broadband limiting of these materials and from analysis of the measurements· I describe structures of materials that may show promising broadband optical limiting. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1320307 / Thesis (Ph.D.) -- University of Adelaide, School of Chemistry and Physics, 2008

Title page, abstract and table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / With the increasing use of lasers it is necessary to develop materials that can provide protection to eyes and other sensitive devices. This thesis reports on an investigation into optical limiting of Transition Metal Acetylides (TMAs) that transmit ambient light levels of light but block high energy (laser) light across the visible part of the spectrum. A standard optical limiting testbed is used to measure opt~callimiting at 470, 532 and 630 om for a wide range of Pt:ethynyl related TMAs. I report the effect on optical limiting of altering the central bridge, heavy metal, terminal group, solubilising group and oligomerisation. Most of these materials showed poor optical limiting, especially in the red. Two dimers of Pt:ethynyl, however, have clamping levels at 532 om better than that for Pt:ethynyl. I therefore describe a detailed spectroscopic investigation of two series of oligomers and discuss their structure/property relationships. This investigation also includes a precursor ofPtethynyl, PEPE, which shows remarkable limiting. I also report modelling of optical limiting using a 5-level model constructed using the spectroscopic data. I show that the 5-level model can be validated and accurately predicts the limiting for PEPE against both ps and ns pulses. It can also be used to predict ps limiting for Pt:ethynyl and its oligomers. For ns pulses, however, it predicts much less limiting than that observed. I therefore propose a new mechanism that is important for ns limiting by TMAs. Finally I discuss the broadband limiting of these materials and from analysis of the measurements· I describe structures of materials that may show promising broadband optical limiting. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1320307 / Thesis (Ph.D.) -- University of Adelaide, School of Chemistry and Physics, 2008

The biological significance of macrocyclic complexes has been recognized since they were first synthesized by Neil Curtis. They have the potential to play a critical role in mimicking metalloprotein active sites. Nine Curtis macrocyclic complexes have been studied using X-ray crystallographic techniques. Their structures have been solved and comparisons of the results have been made. Biological importance is also true of the macrocyclic counterpart; side-off and end-off compartmental ligands. In some circumstances these types of ligands are more appropriate because they have extra flexibility due to their pendant arms not being fixed in place by another head-unit, like a traditional macrocycle. The synthesis of a proposed compartmental ligand; 2,2-(N,Nʼ-bis(benzimidazole-2-ylmethyl)methylamine-5,5ʼ-di-tert-butyl-3,3ʼmethanediyl-dibenzyl alcohol (Ligand 1(L1)), has been proposed and outlined. The pendant arms: bis(benzimidazole-2-ylmethyl)amine (BBIM), were successfully synthesized and characterized with 1H NMR, IR and X-ray crystallography. The head-unit: 5,5ʼ-Di-tert-butyl-2,2ʼ-dihydroxy-3,3ʼ-methanediyl-dibenzene methanol (DHTMBA), of L1 was synthesized and characterized using 1H NMR, IR and mass spectrometry. A similar head-unit; 5,5ʼ-Di-methyl-2,2ʼ-dihydroxy-3,3ʼ-methanediyl-dibenzene methanol (DHMMBA), was synthesized in an effort to shorten the synthetic time of the head-unit. This was consequently converted to the chlorine analogue; 3,3ʼ-Bis(chloromethyl)-5,5ʼ-dimethyl-2,2ʼ-methane-diyldiphenol (Cl-DHMMB), and characterized with 1H NMR, IR and X-ray crystallography. Efforts were made to synthesize Ligand 1, but due to synthetic difficulties and time restraints this proved unsuccessful. Suggestions have been made to develop this synthesis.

Thesis (Ph.D.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references (ℓ. 134-138)

Thesis (Ph. D.)--University of Hong Kong, 2007.

Thesis (Ph.D.) -- McMaster University, 2001. / Includes bibliographical references. Also available via World Wide Web.

Thesis (Ph.D.)--McMaster University (Canada), 1995. / Source: Dissertation Abstracts International, Volume: 56-12, Section: B, page: 6741. Adviser: C. J. L. Lock.

Thesis (Ph.D.) -- Dept. of Physical and Inorganic Chemistry, University of Adelaide, 1974.